package com.sky.service.impl;


import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealOverViewVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Slf4j
@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private CategoryMapper categoryMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;


    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {

        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);

        long total = page.getTotal();
        List<SetmealVO> records = page.getResult();

        return new PageResult(total,records);
    }

    @Override
    public SetmealVO geyById(Long id) {

        Setmeal setmeal = setmealMapper.getBySetmealId(id);
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);

        Long categoryId = setmeal.getCategoryId();
        String categoryName = categoryMapper.getCategoryById(categoryId);
        setmealVO.setCategoryName(categoryName);

        List<SetmealDish> list = setmealDishMapper.getBySetmealId(id);
        setmealVO.setSetmealDishes(list);


        return setmealVO;
    }

    @Override
    public void update(SetmealVO setmealVO) {

        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealVO,setmeal);
        setmealMapper.update(setmeal);


        setmealDishMapper.delete(setmeal.getId());
        List<SetmealDish> setmealDishes = setmealVO.getSetmealDishes();
        if (setmealDishes.size() > 0 && setmealDishes != null) {
            setmealDishes.forEach(setmealDish -> {
                setmealDish.setSetmealId(setmeal.getId());
            });
            setmealDishMapper.insertBatch(setmealDishes);
        }

    }

    @Override
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if(status == StatusConstant.ENABLE){
            //select a.* from dish a left join setmeal_dish b on a.id = b.dish_id where b.setmeal_id = ?
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if(dishList != null && dishList.size() > 0){
                dishList.forEach(dish -> {
                    if(StatusConstant.DISABLE == dish.getStatus()){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }

        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    @Override
    public void delete(List<Long> ids) {
        ids.forEach(id -> {
            Setmeal setmeal = setmealMapper.getBySetmealId(id);
            if(StatusConstant.ENABLE == setmeal.getStatus()){
                //起售中的套餐不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });

        ids.forEach(setmealId -> {
            //删除套餐表中的数据
            setmealMapper.deleteById(setmealId);
            //删除套餐菜品关系表中的数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });
    }

    @Override
    public void save(SetmealDTO setmealDTO) {

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.insert(setmeal);
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealDishMapper.getDishItemBySetmealId(id);
    }

    @Override
    public SetmealOverViewVO overviewSetmeals() {
        Setmeal setmeal = new Setmeal();
        SetmealOverViewVO setmealOverViewVO = new SetmealOverViewVO();

        setmeal.setStatus(StatusConstant.ENABLE);
        setmealOverViewVO.setSold(setmealMapper.list(setmeal).size());
        setmeal.setStatus(StatusConstant.DISABLE);
        setmealOverViewVO.setDiscontinued(setmealMapper.list(setmeal).size());
        return setmealOverViewVO;
    }
}
